Retired
Swanson, J. J., W.F. Watts, D. B. Kittelson, R. A. Newman, R. R. Ziebarth. 2013. Simultaneous Reduction of Particulate Matter and NOx Emissions Using 4-Way Catalyzed Filtration Systems. Environ. Science & Technol. (In press).
Swanson, J. J., W.F. Watts, D. B. Kittelson, R. A. Newman, R. R. Ziebarth. 2013. Filtration Efficiency and Pressure Drop of Miniature Diesel Particulate Filters. Aerosol S cience & Technology 47:452-461.
Watts, W. F., T. B. Huynh, G. Ramachandran. 2012. Quartz Exposure Trends In Metal And Nonmetal Mining. J. Occupational & Environ. Hygiene. 9(12):720-732.
Campbell, J., W. Watts, D. Kittelson. 2012. Reduction of Accessory Overdrive and Parasitic Loading on a Parallel Electric Hybrid City Bus. SAE Technical Paper Series 2012-01-1005.
Kittelson, D. B., W. F. Watts, A. Walker, M. Twigg. 2011. On-road Evaluation of an Integrated SCR and Continuously Regenerating Trap Exhaust System. SAE Technical Paper Series 2012-01-1088.
Kittelson, D. B, S. J. Taff, D. E. Bennett, C-T. G. Chan, W. F. Watts. 2011. Performance and Emissions of a Second Generation Biofuel - DME. 7th Asian DME Conference Proceedings, November 16-18, 2011, Niigata, Japan.
Boies, A. M., D. McFarlane, S. Taff, W. F. Watts, D. B. Kittelson. 2011. Implications of Local Lifecycle Analyses and Low Carbon Fuel Standard Design on Gasohol Transportation Fuels. Energy Policy. 39(11):7191-7201, doi: 10.1016/j.enpol.2011.08.040.
Boies, A., W. Watts, and D. B. Kittelson. 2011. Minnesota Low Carbon Fuel Standards Study: A Lifecycle Assessment of Greenhouse Gas Emissions for Minnesota Transportation Fuels. Prepared for Minnesota Department of Commerce (Contract No. B24112). June 2011. Link
Swanson, J., W. Watts, and D. Kittelson. 2011. Diesel Exhaust Aerosol Measurements Using Air-Ejector and Porous Wall Dilution Techniques. SAE Tech. Paper Series 2011-01-0637. [Also published in SAE International Journal of Engines 4 (1), 667-676.]
Watts, W. F. and K. F. Bailey. 2010. Estimating Diesel Particulate Matter Concentrations Underground. Stone, Sand & Gravel Review. July/August 2010, p 23-25.
Swanson, J., D. Kittelson, D. Pui, and W. Watts. 2010. Alternatives to the Gravimetric Method for Quantification of Diesel Particulate Matter Near the Lower Level of Detection. J. Air Waste Management Assoc. 60(10):1177-1191.
Franklin, L. M, A. S. Bika, W. F. Watts, D. B. Kittelson. 2010. Comparison of Water and Butanol Based CPCs for Examining Diesel Combustion Aerosols. Aerosol Sci. Technol. 44:629-638.
Watts, W. F., D. D. Gladis, M. F. Schumacher, A. C. Ragatz, and D. B. Kittelson. 2010. Evaluation of a Portable Photometer for Estimating Diesel Particulate Matter Concentrations in an Underground Limestone Mine. Annals of Occupational Hygiene. 54(5):566-574.
Boies, A., S. Hankey, D. Kittelson, J. D. Marshall, P. Nussbaum, W. Watts, and E. Wilson. 2009. Reducing Motor Vehicle GHG Emissions in a non-Californian State: A Case Study for Minnesota. Environmental Science & Technology, 43(23):8721-8729.
Johnson, J. P., D. B. Kittelson, W. F. Watts, Jr. 2009. The Effect of Federal Fuel Sulfur Regulations on In-Use Fleets: On-Road Heavy-Duty Source Apportionment. Environmental Science & Technology, 43(14):5358–5364.
Swanson, J. J., D. B. Kittelson, W. F. Watts, D. D. Gladis, M.V. Twig. 2009. Influence of Storage and Release on Particle Emissions from New and Used CRTs. Atmospheric Environment, 43:3998-4004.
Ragatz, A. C., J. J. Swanson, D. B. Kittelson, and W. F. Watts. 2009. Particle and Gaseous Emission Characteristics of a Formula SAE Race Car Engine. SAE Technical. Paper Series 2009-01-1400, 8 pp.
Apple, J., D. Gladis, W. Watts, and D. Kittelson. 2009. Measuring Diesel Ash Emissions and Estimating Lube Oil Consumption Using a High Temperature Oxidation Method. SAE International Journal Fuels and Lubricants. 2(1):850-559, 2009. [SAE Technical. Paper Series 2009-01-1843, 10 p.]
Swanson, J., A. Ragatz, W. Watts, D. Kittelson and R. Winsor. 2009. Nanoparticle Measurements Used to Detect an Engine Oil Fault Control Ring Failure. Proceedings of the Institution of Mechanical Engineers. Vol 223 Part D: Journal of Automobile Engineering, p. 1071-1076.
Kittelson, D. B., W. F. Watts, J. P. Johnson, C. Thorne, C. McCann, M. Payne, S. Goodier, C. Warrens, H. Preston U. Zink, D. Pickles, C. Goersmann, M. V. Twigg, A. P. Walker and R. Boddy. 2008. “Effect of Fuel and Lube Oil Sulfur on the Performance of a Diesel Exhaust Gas Continuously Regenerating Trap,” Environmental Science & Technology. 42:9276-9282.
Boies, A., D. Kittelson, W. Watts, J. Lucke, L. McGinnis, J. Marshall, T. Patterson, P. Nussbaum, and E. Wilson. 2008. “A Summary of the Study: Reducing Greenhouse Gas Emissions From Transportation Sources in Minnesota,” Center for Transportation Studies, University of Minnesota, CTS 08-10S, 10 pp. Link
Boies, A., D. Kittelson, W. Watts, J. Lucke, L. McGinnis, J. Marshall, T. Patterson, P. Nussbaum, and E. Wilson. 2008. “Reducing Greenhouse Gas Emissions from Transportation Sources in Minnesota. Center for Transportation Studies, University of Minnesota, CTS 08-10, 60 pp. Link
Schauer, J. J., C.G. Christensen, D.B. Kittelson, J.P. Johnson and W.F. Watts. 2008. “Impact of Ambient Temperatures and Driving Conditions on the Chemical Composition of Particulate Matter Emissions from Non- Smoking Gasoline-Powered Motor Vehicles,” Aerosol Science and Technology, 42(3):21-223.
Filice, M., W. F. Watts and D. B. Kittelson. 2007. “Near Real-Time Ash Measurement: A Preliminary Study. Extended Abstract, Poster prepared for Seminar on Industrial Emissions and Immissions: New Problems Caused by Ultrafine Particulate,” 11th International Trade Fair of Material & Energy Recovery and Sustainable Development, November 7-10, 2007, Rimini, Italy.
Elder, A., J-P. Couderc, R. Gelein, S. Eberly, C. Cox, X. Xia, W. Zareba, P. Hopke, W. Watts, D. Kittelson, M. Frampton, M. Utell, and G. Oberdörster. 2007. “Effects of On-Road Highway Aerosol Exposures on Autonomic Responses in Aged, Spontaneously Hypertensive Rats,” Inhalation Toxicology. 19(1):1-12.
Grose, M., H. Sakurai, J. Savstrom, M. R. Stolzenburg, W. F. Watts, Jr., C. G. Morgan, I. P. Murray, M. V. Twigg, D. B. Kittelson, and P. H. McMurry. 2006. “Chemical and Physical Properties of Ultrafine Diesel Exhaust Particles Sampled Downstream of a Catalytic Trap,” Environmental Science & Technology. 40(17); 5502-5507.
Kittelson, D. B., W. F. Watts, J. P. Johnson, C. Rowntree, M. Payne, S. Goodier, C. Warrens, H. Preston U. Zink, M. Ortiz, C. Görsmann, M. V. Twigg, A. P. Walker and R. Caldow. 2006. “On-Road Evaluation of Two Diesel Exhaust Aftertreatment Devices,” Journal Aerosol Science, 37:1140 - 1151.
Kittelson, D. B., W. F. Watts, J. P. Johnson, C. J. Rowntree, S. P. Goodier, M. J. Payne, W. H. Preston, C. P. Warrens, M. Ortiz, U. Zink, C. Goersmann, M. V. Twigg, A. P. Walker. 2006. “Driving Down On-Highway Particulate Emissions,” SAE Technical Paper Series 2006-01-0916.
Kittelson, D. B., W. F. Watts, J. P. Johnson, J. Schauer, D. R. Lawson. 2006. “On-road and Laboratory Evaluation of Combustion Aerosols Part 2: Summary of Spark Ignition Engine Results,” Journal Aerosol Science, 37(8):931-949.
Kittelson, D. B., W.F. Watts, J.P. Johnson. 2006. “On-road and Laboratory Evaluation of Combustion Aerosols. Part 1: Summary of Diesel Engine Results,” Journal Aerosol Science, 37(8): 913-930.
Jacobson, M. Z., D. B. Kittelson, and W. F. Watts. 2005. “Enhanced Coagulation Due to Evaporation and its Effect on Nanoparticle Evolution,” Environmental Science & Technology, 39(24):9486-9492.
Kasper, A., H. Burtscher, J. P. Johnson, D. B. Kittelson, W. F. Watts, U. Baltensperger, and E. Weingartner. 2005. “Particle Emissions from SI-Engines during Steady State and Transient Operating Conditions,” SAE Technical Paper Series 2005-01-3136, 15 pp.
Kittelson, D. B., W. F. Watts, J. C. Savstrom, and J. P. Johnson. 2005. “Influence of a Catalytic Stripper on the Response of the PAS, DC, CPC and the SMPS,” Journal Aerosol Science 36:1089-1107.
Ramachandran, G., D. Paulsen, W. Watts, D. Kittelson. 2005. “Mass, Surface Area and Number Metrics in Diesel Occupational Exposure Assessment,” Journal Environmental Monitoring. 7(7): 728 - 735.
Johnson, J. P., D. B. Kittelson, W. F. Watts, 2005. “Source Apportionment of Diesel and Spark Ignition Exhaust Aerosol Using On-Road Data from the Minneapolis, Metropolitan Area,” Atmospheric Environment. 39(11):2111-2121.
Elder, A.C.P., Gelein R., Finkelstein J., Frampton M., Utell M., Carter, J., Driscoll, K., Kittelson, D., Watts W. , Hopke P., Vincent R., Premkumari K., Oberdorster, G. “Effects of Inhaled Fine/Ultrafine Particles Combined with Other Air Pollutants. 2004. In: Effects of Air Contaminants on the Respiratory Tract - Interpretations from Molecules to Meta Analysis,” INIS Monographs, Fraunhofer IRB Verlag, Stuttgart, Germany, U. Heinrich, editor, pp. 53-68.
Kittelson, D. B., W.F. Watts, J.P. Johnson. 2004. “Ultrafine and nanoparticle emissions: a new challenge for internal combustion engine designers,” In Aerosols Handbook: Measurements, Dosimetry and Health Effects - Chapter 4, pp 47-60. CRC Press. Edited by L. S. Ruzer, N. H. Harley.
Watts, W. F. 2004. “Reducing Diesel Particulate Matter Exposure in Mines,” Strata Mechanics Research Institute of the Polish Academy of Sciences. Archives of Mining Sciences 49(4):557-575.
Kittelson, D. B., W. F. Watts, J. P. Johnson, M. L. Remerowki, E. E. Ische, G. Oberdörster, R. M. Gelein, A. C. Elder, P. K. Hopke, E. Kim, W. Zhao, L. Zhou, and C.-H. Jeong. 2004. “On-Road Exposure to Highway Aerosols 1. Aerosol and Gas Measurements,” Inhalation Toxicology 16(suppl. 1):31-39.
Elder, A. C. P., R. Gelein, J. Finkelstein, R. Phipps, M. Frampton, M. Utell, D. B. Kittelson, W. F. Watts, P. Hopke, C. Jeong, W. Liu, W. Zhao, L. Zhuo, R. Vincent, P. Kumarathasan, and G. Oberdörster. 2004. “On-Road Exposure to Highway Aerosols 2. Exposures of Aged, Compromised Rats,” Inhalation Toxicology 16(suppl. 1):41-53.
Kittelson, D. B., W. F. Watts and J. P. Johnson. 2004. “Nanoparticle Emissions on Minnesota Highways,” Atmospheric Environment 38:9-19.